FEATURES
Unique 1-Wire interface requires only one port pin for communication
Multidrop capability simplifies distributed temperature sensing applications
Requires no external components
Can be powered from data line. Power supply range is 3.0V to 5.5V
Zero standby power required
Measures temperatures from -55°C to +125°C. Fahrenheit equivalent is -67°F to +257°F
±0.5°C accuracy from -10°C to +85°C
Thermometer resolution is programmable from 9 to 12 bits
Converts 12-bit temperature to digital word in 750 ms (max.)
User-definable, nonvolatile temperature alarm settings
Alarm search command identifies and addresses devices whose temperature is outside of Programmed limits (temperature
alarm condition)
Applications include thermostatic controls, industrial systems, consumer products,
thermometers, or any thermally sensitive system
The makers of handheld medical, industrial and consumerdevices use a wide variety of high resolution, small tomedium sized color TFT LCD displays. The power supplydesigners for these displays must contend with shrinkingboard area, tight schedules, and variations in displaytypes and feature requirements. The LTC®3524 simplifi esthe designer’s job by combining a versatile, easily Programmed,TFT LCD bias supply and white LED backlightdriver in a low profi le 4mm × 4mm QFN package.
便攜式信號采集在機器健康診斷系統(tǒng)中有較高的應(yīng)用價值。機器健康診斷的信號特點是包括低頻信號。本文研究是為了實現(xiàn)簡易而且低成本的低頻便攜式信號采集。以Microchip公司單片機PIC18F1320為核心設(shè)計信號采集電路，實現(xiàn)了信號的采集和保存。系統(tǒng)采用串行電可擦除芯片24LC32A保存數(shù)據(jù)，經(jīng)過有線通信，信號數(shù)據(jù)由串行口通過MAX232芯片輸送到微型計算機接收和保存，最后繪制出信號波形。 微型計算機程序采用Visual Basic編程。研究成功采樣頻率為3 kHz的復(fù)雜信號，證明該方案符合設(shè)計要求。
Abstract:
Portable signal acquisition is useful in machine health monitoring systems. The signal characteristics of machine health monitoring includes low frequency signals. The goal of this study is to realize simple, inexpensive and portable low frequency signal sampling. This paper provides the project of signal acquisition system design based on PIC18F1320 microcontroller manufactured by the Microchip Technology Incorporation to achieve signal sampling and storage. The system adopted EEPROM 24LC32A to store the signal data. The microcomputer received data via wired link with the MAX232 IC through the serial port. The microcomputer program, Programmed in Visual Basic, received the data, stored it and plotted the signal. The study successfully samples 3kHz complicated signals and thus meets the design requirement.
介紹了以AVR單片機ATmega16為核心，采用前端信號調(diào)理電路、程控增益放大器以及波形顯示LCD（GDM12864A）實現(xiàn)的一個簡易示波器。并給出該系統(tǒng)設(shè)計的硬件和軟件設(shè)計方案。
Abstract:
Abstract:This paper introduces an easy digital storage oscilloscope based on the AVR microcontroller ATmega16,especially emphasizes on the software design and the hardware design which contains signal processing circuit,gain-Programmed amplifier circuit and LCD’s interface circuit and so on.
介紹了基于單片機航空交流電參數(shù)測試儀的系統(tǒng)設(shè)計。以Silicon Labs公司的C8051F005單片機為核心設(shè)計出數(shù)據(jù)采集板，通過RS-232串口與上位機通訊。運用Lab Windows/CVI編寫的上位機軟件實現(xiàn)信號的檢測以及波形和數(shù)據(jù)的顯示，給出了測試儀硬件電路的組成和軟件流程圖。本系統(tǒng)具有硬件結(jié)構(gòu)簡單、容易實現(xiàn)和成本低等特點，在實際應(yīng)用中其穩(wěn)定性、精確性均能滿足客戶要求。
Abstract:
The design of aeronautics AC parameters tester based on the single-chip is introduced.The core component of data acquisition board is C8051F005 single chip of Silicon Labs Company,and communication with PC through RS-232. The signal processing software Programmed with LabWindows/CVI can be used successfully to fulfill inspection of signal and display of the waveform and data. The hardware and software configuration of test instrument are provided.The hardware of the system is simple, and can be easily realized.The stability and precision of the measurement instrument are enough to meet the requirements.
